JP7385242B2 - Sandwich packaging bag, sandwich packaging body, and sandwich packaging method - Google Patents

Description

The present invention relates to a food packaging body for packaging right-angled triangular sandwiches.

The sandwiches, which are shaped like right-angled triangles, are displayed in stores in packaging bags made of plastic film. Patent Document 1 and the like describe a packaging bag for storing such a right triangular sandwich.

The sandwich packaging body of Patent Document 1 has a first plastic sheet and a second plastic sheet, the first plastic sheet and the second plastic sheet have isosceles trapezoidal portions having the same shape, and the hypotenuse portion of the isosceles trapezoidal portion. A connection part between the first plastic sheet and the second plastic sheet is formed with a predetermined width on the upper side, and an opening where the first plastic sheet and the second plastic sheet are not connected is formed on the lower side of the isosceles trapezoid. It has become. Further, an opening assisting member such as a cut tape or a third sheet for opening is provided in the center to facilitate opening.

Furthermore, Cited Document 2 describes cutting out a paper sheet into a rectangular shape, connecting it to a long plastic sheet, and cutting or fusing it to make a triangular food packaging bag for food. . It is said that this increases the sense of solidity and creates a sense of luxury (ibid. 0019).

JP2017-30841 Publication Patent Publication Japanese Patent Application Publication No. 2005-35673

A sandwich packaging material made of a plastic sheet described in Patent Document 1 has an isosceles trapezoidal food container, in which a right triangular sandwich is placed and packaged. It can be packaged neatly along the right triangular shape of the sandwich with almost no gaps. Furthermore, since an opening assisting member such as a cut tape is provided, the package can be opened easily and the sandwich inside can be taken out from the opening. Furthermore, since it is made of a transparent plastic sheet, the sandwich inside can be easily observed.

However, after use, plastic containers must be disposed of separately from flammable materials. In addition, uncollected plastics leak into the environment, becoming one of the causes of marine pollution, and their negative impact on the ecosystem has become a problem.

The food packaging bag described in Patent Document 2 uses a paper sheet in addition to a plastic sheet. However, the purpose of Patent Document 2 is to increase the sense of solidity and create a sense of luxury. As shown in document 0030, cutting a paper sheet band to a predetermined length and overlapping the cut paper sheet on a plastic sheet does not reduce the amount of plastic used, and furthermore, the waste is reduced by the amount of paper sheet. will increase. From the same document 0034 onwards, a plastic sheet band and a paper sheet band are each unrolled from a raw roll, each is cut into a predetermined length by a cutter, and the edges of the cut plastic sheet and the cut rectangular paper sheet are separated. It is described that a front sheet band is formed by alternately joining a rectangular plastic sheet and a rectangular paper sheet by sealing the parts with a heat seal bar while the ends are overlapped. ing. However, this process of alternately joining rectangular plastic sheets and rectangular paper sheets is not actually possible, and even if it were to be carried out, it would require extremely complex and large-scale equipment and processes. It ends up. Further, in a sheet band made by alternately joining rectangular plastic sheets and rectangular paper sheets, the transparent portion cannot be formed into a window shape, and the appearance of the food cannot be freely selected. Furthermore, if water is attached to or absorbed by the paper sheet, it will not be able to maintain its hardness and deformation will occur. Furthermore, bags made of paper sheets are harder than plastic films and are difficult to open with cut tape, and it takes time and effort to fold and seal the right triangular sandwiches after storing them.

An object of the present invention is to provide a packaging bag and a sandwich packaging body that are easy to dispose of, have little negative impact on the environment, are easy to store a right-angled triangular sandwich, and can form a packaging body in which the sandwich can be observed beautifully. do.

In order to solve the above problems, the sandwich packaging bag of the present invention has an isosceles trapezoidal food storage portion formed by overlapping a first paper sheet and a second paper sheet, and a short side of the isosceles trapezoid shape. an ear portion adjacent to the food storage portion along a side, and a fold portion adjacent to the food storage portion along a long side of the isosceles trapezoid shape;
A connecting portion where the first paper sheet and the second paper sheet of the food storage portion are connected along the short side and oblique side of the approximately isosceles trapezoid shape, and a non-connecting portion along the long side are formed,
A window is formed by a cutout part provided inside a rectangle whose one side is the upper side of the isosceles trapezoid shape that is the food storage part of the first paper sheet, and a transparent sheet attached to the cutout part from the back side of the first paper sheet. is formed,
The first paper sheet and the second paper sheet are paper sheets that have water resistance on their outer surfaces.

In addition to the above configuration, it is preferable that the first paper sheet and the second paper sheet are laminated on their inner surfaces. Further, it is preferable that the inner laminate layer and the transparent sheet of the first paper sheet and the second paper sheet are made of biodegradable plastic.
It is preferable that a folding guide line for folding the first paper sheet on the bottom surface of the triangular sandwich is formed on the non-connecting portion side of the first paper sheet.
The first paper sheet has a substantially rectangular cutout, and there is an interval of 10 mm or more and 25 mm or less between the upper side of the isosceles trapezoid shape and the upper side of the cutout, and between the lower side of the cutout and the lower end of the slope of the sandwich. It is preferable that there is an interval of 10 mm or more and 25 mm or less.
Inside the rectangle with one side being the short side of the isosceles trapezoid shape of the second paper sheet, there is a horizontal cutting guide line provided horizontally near the top or bottom side of the rectangle, and a horizontal cutting guide line provided vertically from both ends of the horizontal score line. It is preferable that a cutting guide section formed by a vertical cutting guide line is formed, and an opening sheet provided on the dividing guide section.

Furthermore, the sandwich package of the present invention includes an isosceles trapezoid-shaped food storage portion formed by overlapping a first paper sheet and a second paper sheet having water resistance on the outer surface, and a short side of the isosceles trapezoid shape. an ear portion adjacent to the food storage portion along the long side of the isosceles trapezoid shape, and a folded portion adjacent to the food storage portion along the long side of the isosceles trapezoid shape; A connecting part where the first paper sheet and the second paper sheet of the food storage part are connected, and a non-connecting part along the long side are formed,
The first paper sheet and the second paper sheet are laminated with biodegradable plastic material on their inner surfaces.
A folding guide line for folding onto the triangular sandwich is formed on the non-connected side of the first paper sheet;
A substantially rectangular cutout is provided inside a rectangle whose side is the short side of the isosceles trapezoid shape of the first paper sheet, and there is a gap of 10 mm or more and 25 mm or less between the upper side of the isosceles trapezoid shape and the upper side of the cutout. Yes, there is a gap of 10 mm or more and 25 mm or less between the lower side of the cutout and the lower edge of the sandwich slope,
A window is formed by a transparent sheet made of biodegradable plastic attached to the cutout from the back side of the first paper sheet,
Inside a rectangle whose sides are the short sides of the isosceles trapezoid shape of the second paper sheet, a horizontal cutting guide line is provided horizontally near the top or bottom edge of the rectangle, and a horizontal cutting guide line is provided vertically from both ends of the horizontal cutting guide line. A sandwich packaging body in which a right triangular sandwich is packaged in a sandwich packaging bag having a cutting guide section formed of a vertical cutting guide line, and a sandwich packaging bag having an opening sheet provided above the cutting guide section;
At the top and bottom of the surface along the hypotenuse of the right triangular sandwich, the areas where no ingredients are sandwiched between the breads are the distance between the top side of the isosceles trapezoid shape and the top side of the cutout, and the distance between the bottom side of the cutout and the second are covered by the spaces between the fold lines and are not observed from the outside.

The sandwich packaging bag of the present invention uses paper, which is incinerated and easily decomposed in the environment, as its main material, uses less plastic, and has less negative impact on the environment. The first paper sheet and the second paper sheet have water resistance on their outer surfaces and are capable of retaining their shape during transportation and display of the sandwich package. Since the bag has fold lines, the opening of the bag can be easily folded during packaging. The position and shape of the window can be selected, and the surface along the hypotenuse of a right-angled sandwich can be made to appear to increase the commercial value.

It is a front view showing a sandwich packaging bag. It is a rear view of the same. It is a longitudinal sectional view of the same. It is a cross-sectional view of the same. FIG. 2 is a partially enlarged sectional view schematically showing the structures of a first paper sheet and a second paper sheet. FIG. 3 is a front view showing the first paper sheet. It is a rear view of the same. It is a longitudinal sectional view of the same. It is a cross-sectional view of the same. FIG. 6 is a front view showing the second paper sheet. It is a rear view of the same. It is a longitudinal sectional view of the same. It is a cross-sectional view of the same. FIG. 2 is a perspective view showing an example of a sandwich packaging method. It is a perspective view showing a sandwich package. FIG. 3 is a perspective view showing a method of opening a sandwich package.

Embodiments for carrying out the present invention will be described in detail based on the drawings. 1 is a front view showing a sandwich packaging bag, FIG. 2 is a back view, FIG. 3 is a longitudinal sectional view taken along line AA, FIG. 4 is a cross sectional view taken along line BB, and FIG. 5 is a first paper sheet and a second paper sheet. FIG. 2 is a partially enlarged sectional view schematically showing the structure of two paper sheets. Although each sheet constituting this sandwich packaging bag is thin, the thickness is emphasized in the cross-sectional view to make the structure easier to understand. In particular, in FIG. 5, the thickness is exaggerated compared to the actual thickness.

The main body of the sandwich packaging bag 1 is formed by overlapping a first paper sheet 2 and a second paper sheet 3 having substantially the same external shape. Both the first paper sheet 2 and the second paper sheet 3 are thin paper sheets for food packaging, and have water resistance on their outer surfaces. Although the paper itself may be water resistant, in this example, water resistance is imparted by coating the outer surface with a water resistant material. The inwardly facing surfaces of the first paper sheet 2 and the second paper sheet 3 are each laminated with a thin plastic film. This laminate layer 23 may be made of polyester, polypropylene, etc., but it is preferable to use biodegradable plastic. Since both the first paper sheet 2 and the second paper sheet 3 are paper sheets, they are opaque.

The sandwich packaging bag 1 has a food storage portion 4 in the shape of an isosceles trapezoid with an upper side shorter than a lower side. In this food storage section 4, the first paper sheet 2 and the second paper sheet 3 are connected at the upper side 5 and the oblique side 6 of the side part. The connection may be made by adhesive, but in this example, since the first paper sheet 2 and the second paper sheet 3 are laminated on their respective inward facing surfaces, the connection is made by heat sealing. On the other hand, on the lower side 7, the first paper sheet 2 and the second paper sheet 3 are not connected. Therefore, the food container 4 has a bag shape with only the lower side 7 open, and a sandwich can be stored therein. Therefore, the shape of the food container 4 corresponds to the shape of the sandwich to be accommodated. This sandwich packaging bag 1 accommodates a right triangular sandwich, but the upper side 5 is approximately the same thickness as the sandwich or slightly wider, and the angle θ of the hypotenuse 6 with respect to the perpendicular is the angle 2θ of the apex of the sandwich. It's half of that.

An ear part 8 is provided at the upper part of the food storage part 4, and a folding part 9 is provided at the lower part. Although there is no particular restriction on the shape of the ear portion 8 and the folded portion 9, here the ear portion 8 is generally rectangular, and the folded portion 9 is in the shape of an isosceles trapezoid that is narrower on the lower side.

FIG. 6 is a front view showing the first paper sheet, FIG. 7 is a rear view thereof, FIG. 8 is a vertical sectional view taken along line CC, and FIG. 9 is a cross sectional view taken along line DD. 10 is a front view showing the second paper sheet, FIG. 11 is a rear view thereof, FIG. 12 is a vertical sectional view taken along line EE, and FIG. 13 is a cross sectional view taken along line FF. The first paper sheet 2 and the second paper sheet 3 have almost the same external shape, and include an isosceles trapezoidal portion forming the food storage portion 4, a rectangular portion forming the ear portion 8 above it, and a rectangular portion forming the ear portion 8 below. It has an isosceles trapezoidal part forming a folding part 9. The first paper sheet 2 and the second paper sheet 3 form a bag.

A cutout portion 10 is formed in the first paper sheet 2 . This cutout portion 10 is provided at the center of the isosceles trapezoid shape, and is particularly accommodated within a rectangle whose one side is the upper side 7 of the isosceles trapezoid shape. Here, the cutout portion 10 is within the range surrounded by the closed line. Therefore, below the cutout portion 10, there is a portion of the first paper sheet 2 that is not cut out. A transparent sheet 11 is attached to this cutout 10, thereby forming a window. The cutout portion 10 may have a shape that occupies most of a rectangle whose one side is the upper side 7 of the isosceles trapezoid shape, or may be a part of the rectangle. In this example, the cutout 10 is rectangular, and its width is 60% or more of the width of the rectangle. The length is set to such an extent that when the cutout 10 is aligned with the surface along the oblique side of the sandwich (the cut surface of the sandwich) during packaging, the upper and lower portions of the cut surface of the sandwich will not fit. In this case, there is a gap of 10 mm or more and 25 mm or less between the upper side of the isosceles trapezoid shape and the upper side of the cutout, and a gap of 10 mm or more and 25 mm or less between the lower side of the cutout and the lower end of the slope of the sandwich. It is preferable to set it to . In particular, it is preferable for many sandwiches to have a spacing of 20 mm or more and 25 mm or less for both the top and bottom, which covers the top and bottom ends of the slope of the sandwich and effectively shows the parts of the sandwich with the ingredients. In this example, the interval is set to 22 mm. Since the sandwich inside can be observed through the window formed by the cutout 10, it is preferable to use a display that can encourage purchase intent.

Further, as another form of window, the cutout portion may be not only rectangular but also circular, horizontally elongated, etc., and a plurality of cutouts may be provided. The transparent sheet 11 can also be made smaller by making it as small as possible. Alternatively, it may be made as large as possible to cover almost the entire area along the oblique side of the sandwich, excluding the top and bottom ends.

The transparent sheet 11 is a transparent plastic film for food packaging, such as polypropylene or biodegradable plastic. Here, a transparent sheet 11 is attached to the surface of the first paper sheet 2 facing the second paper sheet 3. Therefore, the transparent sheet 11 is provided inside the sandwich packaging bag 1.

In this example, the inner laminate layer 23 of the first paper sheet 2 and the second paper sheet 3 and the transparent sheet 11 are made of oxidatively decomposable plastic. It is made by adding an oxidative decomposition accelerator to polyolefin resin such as polyethylene or polypropylene. As a result, biodegradable plastics can be obtained at low cost, and the timing at which oxidative degradation starts can be controlled by adjusting the amount of oxidative degradation promoter added. Here, we use a resin made by adding an oxidative decomposition accelerator to polyethylene, which is a bioplastic resin derived from sugarcane.

It is preferable that the second paper sheet 3 is provided with an opening assisting member. In particular, it is preferable that an opening assisting member such as a cut tape or an opening sheet be provided inside the rectangular portion having the upper side 7 of the isosceles trapezoid shape as one side. In this example, the second paper sheet 3 is provided with a dividing guide portion 12 . This dividing guide portion 12 is provided at the center of the isosceles trapezoid shape, and is particularly housed within a rectangle whose side is the upper side 5 of the isosceles trapezoid shape. Further, this dividing guide part 12 includes a horizontal dividing guide line 13 provided horizontally near the upper side or the lower side of the rectangular part, and vertical dividing guide lines 14 provided perpendicularly from both ends of the horizontal dividing guide line 13. It is configured in a U-shape. Here, the horizontal dividing guide line 13 is provided on the lower side.

The horizontal dividing guide line 13 and the vertical dividing guide line 14 are for guiding the second paper sheet 3 so that it can be divided along the lines, and may be completely separated along the lines. It may also be a partial cutting line or perforation in which separated parts and connected parts are repeated alternately. In this example, the horizontal dividing guide line 13 and the vertical dividing guide line 14 are formed by perforations. In other words, there is a U-shaped dividing guiding part with the upper side open, and there is no dividing guiding line near the upper side of the part surrounded by this, and other parts of the second paper sheet 3 are formed. connected to parts. It is preferable to form this dividing guide part 12 as large as possible, and make it wide enough to take out the sandwich housed therein. In particular, it is preferable that the horizontal dividing guide line 13 be provided slightly above a first fold line 21, which will be described later.

The unsealing sheet 15 has a cover part 16 for covering the dividing guide part 12 of the second paper sheet 3, and a grip part 17 provided under the cover part 16. The cover portion 16 is generally rectangular and is slightly wider than the dividing guide portion 12, that is, has a size sufficient to form a connecting portion outside the dividing guide portion 12.

The second paper sheet 3 and the opening sheet 15 are connected by adhesive or the like. Alternatively, the second paper sheet 3 or the unsealing sheet 15 may be connected by heat sealing by laminating or applying a heat-fusible material near the connecting portion. An inner connecting portion 18 is provided inside the dividing guide portion 12 to which the second paper sheet 3 and the opening sheet 15 are connected. Then, on the outside thereof, a non-connection part 19 is provided where the second paper sheet 3 and the unsealing sheet 15 are not connected along the division guide part 12, and further, a second paper sheet is provided on the outside of the division guide part 14. 3 and the opening sheet 17 are connected to each other. This outer connecting portion 20 is formed to surround the dividing guide portion 12, thereby closing the periphery of the dividing guide portion 12, and preventing air from entering or exiting through the dividing guide portion 12. . Furthermore, the grip portion 17 at the bottom of the opening sheet 15 is not connected to the second paper sheet 3.

At least one of the first paper sheet 2 and the second paper sheet 3 is provided with a folding guiding wire on the bottom surface of the triangular sandwich on the non-connecting side. Any process that facilitates the folding of the sheet along this line may be used, but for example, a narrow groove can be formed by a press process or the like. When the triangular sandwich is stored in the sandwich packaging bag, an excess portion of the sheet is generated on the non-connected side of the first paper sheet 2 and the second paper sheet 3, and this portion is folded over the bottom of the triangular sandwich. This seals the package. Folding guide lines make it easier to fold hard paper sheets over soft bread. You can select a bending guide line that suits this folding method.

In this example, the second paper sheet 3 is provided with a bending guide line. A horizontal first bending guide line 21 is provided near the lower side of the opening sheet 15. This is a position along the side formed by the vertical surface and the bottom surface of the triangular sandwich when the triangular sandwich is stored in the sandwich packaging bag. Then, second bending guide lines 22 are provided in a V-shape outwardly and downwardly at an angle of 45 degrees from the vicinity of both ends of this first bending guide line 21 . In order to simplify the process of forming the bending guide lines, the first bending guide line 21 and the second bending guide line 22 are formed using a press or the like while the first paper sheet 2 and the second paper sheet 3 are overlapped. Therefore, a bending guide line is also formed at the same position on the first paper sheet 2.

Next, an example of how to use this sandwich packaging bag 1 will be explained. FIG. 14 is a conceptual perspective view showing an example of a sandwich packaging method. Since the lower part of the packaging bag 1 is open, the bag body is expanded from there to form a right triangular sandwich shape to be stored.

Insert sandwich x. Insert the sandwich x from the vertex side of the right triangle and push it all the way in. At this time, the sandwich x is placed in such a direction that the surface (slope) x1 along the oblique side hits the first paper sheet 2, and the vertical surface x2 hits the second paper sheet 3. In this way, the state shown in FIG. 14(a) is reached. In FIG. 14, the opening side of the sandwich packaging bag is shown facing upward, and the bottom surface x3 of the sandwich x is facing upward. The remaining portion at the bottom of the sandwich packaging bag stands on the bottom surface x3 of the sandwich x like four walls. Fold the four wall-like parts of the paper sheet into caramel folds. In this example, the back surface 1 of the sandwich x, that is, the surface 1 protruding above the vertical x2 surface, is folded along the side x4 where the back surface x2 and the bottom surface x3 of the sandwich x intersect, and the width center of the second paper sheet 3 is folded. Cover the bottom x3 of sandwich x. At this time, a part of the surface 2 protruding above the side surface x5 of the sandwich x is also folded, resulting in a state as shown in FIG. 14(b). Here, since the second bending guide line 22 is provided at the bending position of this surface 2, it can be easily bent and the shape shown in FIG. 14(b) can be accurately realized. In this way, the first step of caramel folding is carried out smoothly.

Next, the side 2 protruding above the side surface x5 of the sandwich x is folded in and placed over the bottom surface x3 of the sandwich x. Finally, the side 3 of the remaining sandwich x that is exposed above the slope x1 is folded in to complete the caramel folding. Apply a sticker or adhesive tape to the end of the folded part to seal it. A sandwich package is thus formed.

FIG. 15 is a perspective view of the sandwich package. A triangular sandwich x is made by sandwiching the filling between two or more pieces of bread, usually square or rectangular, and then cut in two along the diagonal. In this way, a sandwich is created in which multiple right-angled triangular pieces of bread are stacked on top of each other. The plane x1 along the oblique side is the cut plane, and the ingredients sandwiched between the breads can be observed. Furthermore, the ingredients can be observed better at the center of the slope x1 than at the upper and lower ends. Particularly in this example, since the window portion 10 is provided over most of the cut surface x1 of the sandwich, the portion where the ingredients are present can be clearly observed. This packaged sandwich x is displayed in the store with the surface x1 along the oblique side facing forward. In this way, by showing the ingredients of the sandwich to the consumer through the transparent sheet 11, it is possible to stimulate the consumer's desire to purchase the sandwich. Furthermore, by looking at the ingredients, consumers can accurately select the sandwich they want to eat.

On the other hand, the window portion 10 does not extend to the upper and lower ends of the cut surface x1 of the sandwich. This portion is an interval portion 24 in which the paper sheet is not cut out. The corners of the sandwich are soft and some deformation may occur. Further, more ingredients are sandwiched in the center, less ingredients are sandwiched at the ends, and no ingredients are sandwiched at the extreme ends. In this example, that part is covered and does not appear in the window. Therefore, the parts of the sandwich with high commercial value can be made to look attractive.

When packaged, the perpendicular surface x2, which is not the cut surface, becomes the position where the opening sheet 15 is provided. The dividing guide part 12 and opening sheet 15 of the package are aligned with the vertical plane x2 of the triangular sandwich, and the horizontal dividing guide line 18 and the tab part 17 are aligned with the vicinity of the right angle part of the triangular sandwich. Become.

In the sandwich x, ingredients including vegetables and seasonings are sandwiched between bread, and water and oil may adhere to the inner surfaces of the first paper sheet 2 and the second paper sheet 3. The first paper sheet 2 and the second paper sheet 3 are laminated on their inner surfaces to prevent adhering moisture and oil from entering the inside of the sheets, resulting in a clean and strong package. maintained. In addition, since the first paper sheet 2 and the second paper sheet 3 are paper sheets that have water resistance on their outer surfaces, they do not lose their strength even when exposed to external moisture or humidity, and the sandwich packaging bag maintains its shape. Can be done.

FIG. 16 is a perspective view showing a method of opening the sandwich package. This sandwich packaging bag can be easily opened by pinching the grip portion 17 with fingers and peeling the opening sheet 15 from the second paper sheet 3. Place the bottom x3 of the sandwich x in the palm of one hand, and grasp the side x5 of the sandwich x with that hand. Pinch the grip portion 17 with the fingers of the other hand and pull up the opening sheet 15 from the second paper sheet 3. Since the second paper sheet 3 and the unsealing sheet 15 are only weakly connected by adhesive, heat seal, etc., they can be easily peeled off. Since the portion of the second paper sheet 3 inside the dividing guide portion 12 is connected to the opening sheet 17 by the inner connecting portion 18, the second paper sheet 3 is torn off from the sandwich packaging bag together with the opening sheet 17. In this way, a large opening 25 is obtained. During this time, sandwich x is grabbed from below with one hand so that it does not fly out of the opening during opening. The sandwich x inside can be easily taken out from this opening 25. Although the ingredients of the sandwich cannot be seen from the side of this opening, the ingredients can be observed through the transparent sheet 11 of the first paper sheet 2. Even when a plurality of sandwiches with different ingredients are stored, the user can look at the transparent sheet 11 and select the sandwich with the ingredients he/she wants to eat.

The tab 17 is located at the bottom of the packaged sandwich, and its connection with the second paper sheet 3 is open downward. Therefore, even if some foreign matter falls on the paper during transportation or storage, it will not get between the grip portion 17 and the second paper sheet 3. Even if foreign matter blows up from below and enters the system temporarily, most of it will fall down naturally and will not remain. Almost no foreign matter sticks to the surface of the packaging bag, keeping it clean.

In the above example, the knob portion 17 is provided facing downward, but it may also be provided facing upward. In this case, the horizontal dividing guide line is provided on the short side (upper side) side of the isosceles trapezoidal food storage section 4, and the dividing guide section 12 is shaped like a U-shape that opens downward.

Further, an adhesiveness reducing treatment portion may be provided along the cut portion of the second paper sheet, and the tear-opening sheet may be adhered to the second paper sheet with a low-adhesive adhesive so that it can be opened and resealed. For example, by applying a treatment such as applying an OP agent to the outer adhesive portion of the second paper sheet 3, the surface can be smoothed and the adhesiveness can be reduced. As a result, the fibers of the second paper sheet 3 are not torn off when the package is opened, the surfaces of the second paper sheet 3 and the opening sheet 15 are kept smooth, and the adhesive remaining at the joints allows them to be reconnected. can do. If all the sandwiches are not eaten, the unsealing sheet 15 can be reattached to the second paper sheet 3 to recreate a good sealed condition, so it can be used as a container for storing leftover sandwiches. I can continue.

The sandwich packaging bag of this invention is mostly made of paper sheets, and the only plastics are the transparent sheet 11 of the window and the laminate layer 23 on the inner surfaces of the first paper sheet 2 and the second paper sheet 3. Even if sandwich packaging bags are not properly disposed of after use, the amount of plastic released into the environment is much less than traditional plastic sandwich packaging bags. Furthermore, by using a biodegradable plastic for the inner laminate layer 23 of the transparent sheet 11, the first paper sheet 2, and the second paper sheet 3, the biodegradable plastic is decomposed into carbon dioxide and water in a short time. By adjusting the amount of oxidation promoter added, it is possible to maintain sufficient strength from production to consumption, and to quickly decompose after use.

The sandwich packaging bag may have a folded portion sealed by thermocompression bonding or the like. In this case, it is preferable to provide a bending guide line suitable for the folding method. Furthermore, the outer surfaces of the first paper sheet 2 and the second paper sheet 3 are preferably coated with a coating material that has gas barrier properties in addition to water resistance, thereby keeping the packaged sandwich fresh and safe for a longer period of time. can be kept in good condition.

1. Sandwich packaging bag 2. 1st paper sheet 3. 2nd paper sheet4. Food storage section (isosceles trapezoid section)
5. Top side 6. Hypotenuse 7. bottom side
8. Ears 9. Folding part 10. Cutout portion 11. Transparent sheet 12. Division guide part 13. Horizontal cutting guide line 14. Vertical dividing guide line 15. Opening sheet 16. Cover portion 17. Knob section 18. Inner connection part 19. Non-connection part 20. Outer connection portion 21. First bending guide line 22. Second bending guide line 23. laminate layer
24. Spacing part 25. Opening 30. Sandwich packaging x. sandwich

Claims (9)

an isosceles trapezoid-shaped food storage portion formed by overlapping a first paper sheet and a second paper sheet; an isosceles trapezoid-shaped ear portion adjacent to the food storage portion along the short side of the isosceles trapezoid shape; a folding section adjacent to the food storage section along a long side of the
A connecting portion where the first paper sheet and the second paper sheet of the food storage portion are connected along the short side and oblique side of the approximately isosceles trapezoid shape, and a non-connecting portion along the long side are formed,
A window is formed by a cutout part provided inside a rectangle whose one side is the upper side of the isosceles trapezoid shape that is the food storage part of the first paper sheet, and a transparent sheet attached to the cutout part from the back side of the first paper sheet. is formed,
The first paper sheet and the second paper sheet are paper sheets having water resistance on the outer surface,
A sandwich packaging bag, wherein a folding guide line for folding onto the bottom surface of a triangular sandwich is formed on the non-connected side of at least one of the first paper sheet and the second paper sheet. A first bending guide line provided at a position along the side formed by the vertical surface and bottom surface of the triangular sandwich when the triangular sandwich is stored, and a 45-degree angle from near both ends of the first bending guide line. 2. A sandwich packaging bag as claimed in claim 1, having a second fold guiding line directed outward at an angle. 3. The sandwich packaging bag according to claim 2, wherein the first fold guide line and the second fold guide line are formed at the same position on the first paper sheet and the second paper sheet 3 by pressing. 4. The sandwich packaging bag according to claim 1, wherein the first paper sheet and the second paper sheet are laminated on their inner surfaces. 5. The sandwich packaging bag according to claim 4 , wherein the inner laminate layer and the transparent sheet of the first paper sheet and the second paper sheet are made of biodegradable plastic. The first paper sheet has a substantially rectangular cutout, and there is an interval of 10 mm or more and 25 mm or less between the upper side of the isosceles trapezoid shape and the upper side of the cutout, and a distance of 10 mm or more and 25 mm or less between the lower side of the cutout and the second fold line. The sandwich packaging bag according to any one of claims 1 to 5, wherein the gap is 10 mm or more and 25 mm or less. Inside the rectangle whose side is the short side of the isosceles trapezoid shape of the second paper sheet, a horizontal dividing guide line is provided horizontally near the top or bottom side of the rectangle, and a horizontal dividing guide line is provided vertically from both ends of the horizontal dividing guide line. A dividing guide part is formed by a vertical dividing guide line.
The sandwich packaging bag according to any one of claims 1 to 6 , further comprising an opening sheet provided on the dividing guide portion. An isosceles trapezoid-shaped food storage section formed by overlapping a first paper sheet and a second paper sheet that have water resistance on the outer surface, and a food storage section that is adjacent to the food storage section along the short side of the isosceles trapezoid shape. a folded portion adjacent to the food storage portion along the long side of the isosceles trapezoid shape; A connected part where the second paper sheet is connected and a non-connected part along the long side are formed,
The first paper sheet and the second paper sheet are laminated with biodegradable plastic material on their inner surfaces.
A folding guide line for folding onto the triangular sandwich is formed on the non-connected side of the first paper sheet;
A substantially rectangular cutout is provided inside the rectangle whose side is the upper side of the isosceles trapezoid that is the food storage portion of the first paper sheet, and there is a distance of 10 mm or more and 25 mm between the upper side of the isosceles trapezoid and the upper side of the cutout. There is the following interval, and there is a interval of 10 mm or more and 25 mm or less between the lower side of the cutout and the second fold line,
A window is formed by a transparent sheet made of biodegradable plastic attached to the cutout from the back side of the first paper sheet,
Inside the rectangle whose side is the short side of the isosceles trapezoid shape of the second paper sheet, a horizontal dividing guide line is provided horizontally near the top or bottom side of the rectangle, and a horizontal dividing guide line is provided vertically from both ends of the horizontal dividing guide line. A sandwich packaging body in which a right-angled triangular sandwich is packaged in a sandwich packaging bag having a dividing guide section formed by a vertical dividing guide line, and a sandwich packaging bag having an opening sheet provided on the dividing guide section;
At the top and bottom of the surface along the hypotenuse of the right triangular sandwich, the areas where no ingredients are sandwiched between the breads are the distance between the top side of the isosceles trapezoid shape and the top side of the cutout, and the distance between the bottom side of the cutout and the second A sandwich package that is covered by the space between the fold lines and is not observed from the outside. A sandwich packaging method using the sandwich packaging bag according to claim 2,
Insert a right triangular sandwich into a sandwich packaging bag from the apex side so that the side along the hypotenuse of the sandwich hits the first paper sheet and the vertical side hits the second paper sheet, and then Fold the side that sticks out along the edge where the back and bottom of the sandwich intersect, place the center width of the second paper sheet over the bottom of the sandwich, and fold the side that sticks out above the sides of the sandwich into the second paper sheet. Fold along the bending guide line,
Fold the side of the sandwich that sticks out above the sides, cover it over the bottom of the sandwich, fold the side of the remaining sandwich that sticks out above the slope, and put a sticker or adhesive tape on the edge of the folded part. Sandwich packaging method that involves pasting and sealing.

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